- Part of Chevrolet's W-series engine family and made famous by The Beach Boys, the Chevy 409 exuded the essence of American muscle, boasting large displacement, rev range and, most of all, power output. Features that made this engine special included combustion chambers inside the block rather than the heads, along with its having the largest bore of any Chevrolet V-8 until the automaker produced the 502.
- The Chevy 409 engine displaced 481 cubic inches of regular unleaded gasoline, muscled out 542 foot-lbs. of torque at 4,500 revolutions per minute (rpm) and produced 531 horsepower at 5,800rpm. The engine had a bore of 4.37 inches, a stroke of 4.0 inches and a compression ratio of 10 to 1.
- The Chevy 409 engine features an L80 block and a 454 cast-iron crankshaft. It also has a Hayes flywheel, Eagle I-beam pushrods and Total Seal piston rings.
- The stock oil pan makes up a part of the L80 block, holding a maximum volume of 6 quarts. The pickup tube, pump and pump drive were all made by Melling.
- The 409 engine used 1964 409/425 L80 heavy porting heads, with valve springs, intake valves, exhaust valves and retainers designed by Manley.